<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form action="https://www.bilibili.com/">
         <input type="text" name="course">
         <input type="submit" value="提交按钮">
         <input type="reset" value="重置按钮">
         <input type="file" value="选择文件按钮">
    </form>
    <!-- <form action="">
        姓名<input  type="text"><br>
        密码<input  type="password"><br>
        性别<input  type="radio" name="gender">男
            <input  type="radio" name="gender" checked="checked">女<br>
        爱好<input  type="checkbox">吃饭
            <input  type="checkbox">睡觉
            <input  type="checkbox">打豆豆<br>
            <input  type="button" value="这是一个普通按钮" onclick="alert('hello')">
    </form> -->
</body>
</html>